projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* mc146818rtc.h - register definitions for the Real-Time-Clock / CMOS RAM |
| 2 | * Copyright Torsten Duwe <duwe@informatik.uni-erlangen.de> 1993 | |
| 3 | * derived from Data Sheet, Copyright Motorola 1984 (!). | |
| 4 | * It was written to be part of the Linux operating system. | |
| 5 | */ | |
| 6 | /* permission is hereby granted to copy, modify and redistribute this code | |
| 7 | * in terms of the GNU Library General Public License, Version 2 or later, | |
| 8 | * at your option. | |
| 9 | */ | |
| 10 | ||
| 11 | #ifndef _MC146818RTC_H | |
| 12 | #define _MC146818RTC_H | |
| 13 | ||
| 14 | #include <asm/io.h> | |
| 15 | #include <linux/rtc.h> /* get the user-level API */ | |
| 16 | #include <asm/mc146818rtc.h> /* register access macros */ | |
| 17 | ||
| 18 | #ifdef __KERNEL__ | |
| 19 | #include <linux/spinlock.h> /* spinlock_t */ | |
| 20 | extern spinlock_t rtc_lock; /* serialize CMOS RAM access */ | |
| 7be2c7c9 DB |
21 | |
| 22 | /* Some RTCs extend the mc146818 register set to support alarms of more | |
| 23 | * than 24 hours in the future; or dates that include a century code. | |
| 24 | * This platform_data structure can pass this information to the driver. | |
| 25 | */ | |
| 26 | struct cmos_rtc_board_info { | |
| 27 | u8 rtc_day_alarm; /* zero, or register index */ | |
| 28 | u8 rtc_mon_alarm; /* zero, or register index */ | |
| 29 | u8 rtc_century; /* zero, or register index */ | |
| 30 | }; | |
| 1da177e4 LT |
31 | #endif |
| 32 | ||
| 33 | /********************************************************************** | |
| 34 | * register summary | |
| 35 | **********************************************************************/ | |
| 36 | #define RTC_SECONDS 0 | |
| 37 | #define RTC_SECONDS_ALARM 1 | |
| 38 | #define RTC_MINUTES 2 | |
| 39 | #define RTC_MINUTES_ALARM 3 | |
| 40 | #define RTC_HOURS 4 | |
| 41 | #define RTC_HOURS_ALARM 5 | |
| 42 | /* RTC_*_alarm is always true if 2 MSBs are set */ | |
| 43 | # define RTC_ALARM_DONT_CARE 0xC0 | |
| 44 | ||
| 45 | #define RTC_DAY_OF_WEEK 6 | |
| 46 | #define RTC_DAY_OF_MONTH 7 | |
| 47 | #define RTC_MONTH 8 | |
| 48 | #define RTC_YEAR 9 | |
| 49 | ||
| 50 | /* control registers - Moto names | |
| 51 | */ | |
| 52 | #define RTC_REG_A 10 | |
| 53 | #define RTC_REG_B 11 | |
| 54 | #define RTC_REG_C 12 | |
| 55 | #define RTC_REG_D 13 | |
| 56 | ||
| 57 | /********************************************************************** | |
| 58 | * register details | |
| 59 | **********************************************************************/ | |
| 60 | #define RTC_FREQ_SELECT RTC_REG_A | |
| 61 | ||
| 62 | /* update-in-progress - set to "1" 244 microsecs before RTC goes off the bus, | |
| 63 | * reset after update (may take 1.984ms @ 32768Hz RefClock) is complete, | |
| 64 | * totalling to a max high interval of 2.228 ms. | |
| 65 | */ | |
| 66 | # define RTC_UIP 0x80 | |
| 67 | # define RTC_DIV_CTL 0x70 | |
| 68 | /* divider control: refclock values 4.194 / 1.049 MHz / 32.768 kHz */ | |
| 69 | # define RTC_REF_CLCK_4MHZ 0x00 | |
| 70 | # define RTC_REF_CLCK_1MHZ 0x10 | |
| 71 | # define RTC_REF_CLCK_32KHZ 0x20 | |
| 72 | /* 2 values for divider stage reset, others for "testing purposes only" */ | |
| 73 | # define RTC_DIV_RESET1 0x60 | |
| 74 | # define RTC_DIV_RESET2 0x70 | |
| 75 | /* Periodic intr. / Square wave rate select. 0=none, 1=32.8kHz,... 15=2Hz */ | |
| 76 | # define RTC_RATE_SELECT 0x0F | |
| 77 | ||
| 78 | /**********************************************************************/ | |
| 79 | #define RTC_CONTROL RTC_REG_B | |
| 80 | # define RTC_SET 0x80 /* disable updates for clock setting */ | |
| 81 | # define RTC_PIE 0x40 /* periodic interrupt enable */ | |
| 82 | # define RTC_AIE 0x20 /* alarm interrupt enable */ | |
| 83 | # define RTC_UIE 0x10 /* update-finished interrupt enable */ | |
| 84 | # define RTC_SQWE 0x08 /* enable square-wave output */ | |
| 85 | # define RTC_DM_BINARY 0x04 /* all time/date values are BCD if clear */ | |
| 86 | # define RTC_24H 0x02 /* 24 hour mode - else hours bit 7 means pm */ | |
| 87 | # define RTC_DST_EN 0x01 /* auto switch DST - works f. USA only */ | |
| 88 | ||
| 89 | /**********************************************************************/ | |
| 90 | #define RTC_INTR_FLAGS RTC_REG_C | |
| 91 | /* caution - cleared by read */ | |
| 92 | # define RTC_IRQF 0x80 /* any of the following 3 is active */ | |
| 93 | # define RTC_PF 0x40 | |
| 94 | # define RTC_AF 0x20 | |
| 95 | # define RTC_UF 0x10 | |
| 96 | ||
| 97 | /**********************************************************************/ | |
| 98 | #define RTC_VALID RTC_REG_D | |
| 99 | # define RTC_VRT 0x80 /* valid RAM and time */ | |
| 100 | /**********************************************************************/ | |
| 101 | ||
| 38e0e8c0 MR |
102 | #ifndef ARCH_RTC_LOCATION /* Override by <asm/mc146818rtc.h>? */ |
| 103 | ||
| 104 | #define RTC_IO_EXTENT 0x8 | |
| 105 | #define RTC_IOMAPPED 1 /* Default to I/O mapping. */ | |
| 106 | ||
| 107 | #endif /* ARCH_RTC_LOCATION */ | |
| 108 | ||
| 1da177e4 | 109 | #endif /* _MC146818RTC_H */ |